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Simulations Plus, Inc.

SLP Net selling
CIK 0001023459 #3339 in the set updated 18 Sep 2026
Bought (120 mo)
$1.40M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$77.77M
$22.62M on a plan · $1.90M straight out of an exercise
Sold at will
$53.25M
176 of 262 sales
Net
−$76.37M
−$51.85M against sales at will

By person

14 insiders · 286 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
WOLTOSZ WALTER S
Director
$1.40M (1)
$70.51M (172)
−$69.12M
8,124,458
$148.52M
−22.6%
DiBella John Anthony II
Chief Revenue Officer
—
$1.63M (10) scheduled
−$1.63M
85,140
$1.56M
+61.8%
Paglia John Kenneth
Director
—
$1.55M (8)
−$1.55M
14,589
$266.69K
—
Ralph David L.
Director
—
$1.04M (4)
−$1.04M
12,797
$233.93K
+240.6%
WEINER DANIEL L
Director
—
$811.47K (7)
−$811.47K
16,547
$302.48K
+1,007%
OCONNOR SHAWN
Chief Executive Officer
—
$669.89K (2)
−$669.89K
0
$0.00
—
Grasela Thaddeus Henry Jr
President
—
$430.72K (35)
−$430.72K
79,763
$1.46M
−81.4%
D ARGENIO DAVID Z
Former Director
—
$362.10K (8)
−$362.10K
33,608
$614.35K
−39.3%
LaVange Lisa
Director
—
$258.20K (10) scheduled
−$258.20K
9,968
$182.22K
+1,788%
WOLTOSZ VIRGINIA E
Secretary-Treasurer
—
$243.07K (1)
−$243.07K
5,703,416
$104.26M
−0.3%
Fiedler-Kelly Jill
President, Services Solutions
—
$167.64K (3) scheduled
−$167.64K
77,817
$1.42M
+17.7%
KNEISEL JOHN ROBERT
Former CFO
—
$90.84K (2)
−$90.84K
3,400
$62.15K
—
Evans Sharlene
Director
—
—
—
17,173
$313.92K
—
FREDERICK WILLIAM W
EVP/CFO
—
—
—
2,100
$38.39K
—

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Individual transactions

77
Insider
Date
Role
Action
Shares
Price
Amount
DiBella John Anthony II
3 Aug 2026
Chief Revenue Officer
Sold on a plan
1,000
$18.28
$18.28K
DiBella John Anthony II
6 Jul 2026
Chief Revenue Officer
Sold on a plan
1,000
$18.36
$18.36K
WOLTOSZ WALTER S
1 Jul 2026
Director
Sold on a plan
4,177
$18.44
$77.02K
DiBella John Anthony II
3 Jun 2026
Chief Revenue Officer
Sold on a plan
1,000
$16.50
$16.50K
WOLTOSZ WALTER S
1 Jun 2026
Director
Sold on a plan
15,000
$17.43
$261.45K
WOLTOSZ WALTER S
4 May 2026
Director
Sold on a plan
15,000
$15.13
$226.95K
DiBella John Anthony II
4 May 2026
Chief Revenue Officer
Sold on a plan
1,000
$14.98
$14.98K
DiBella John Anthony II
15 Apr 2026
Chief Revenue Officer
Sold on a plan
1,000
$13.37
$13.37K
LaVange Lisa
1 Dec 2025
Director
Sold on a plan
866
$16.91
$14.64K
WOLTOSZ WALTER S
1 Oct 2025
Director
Sold on a plan
20,000
$15.39
$307.80K
LaVange Lisa
2 Sep 2025
Director
Sold on a plan
867
$14.10
$12.22K
LaVange Lisa
1 Aug 2025
Director
Sold on a plan
867
$12.93
$11.21K
WOLTOSZ WALTER S
1 Jul 2025
Director
Sold on a plan
12,224
$18.58
$227.12K
WOLTOSZ WALTER S
1 Jul 2025
Director
Sold on a plan
7,776
$17.94
$139.50K
WOLTOSZ WALTER S
2 Jun 2025
Director
Sold on a plan
100
$31.36
$3.14K
WOLTOSZ WALTER S
2 Jun 2025
Director
Sold on a plan
1,000
$30.57
$30.57K
WOLTOSZ WALTER S
2 Jun 2025
Director
Sold on a plan
700
$29.13
$20.39K
WOLTOSZ WALTER S
2 Jun 2025
Director
Sold on a plan
2,700
$27.71
$74.82K
WOLTOSZ WALTER S
2 Jun 2025
Director
Sold on a plan
15,500
$26.72
$414.16K
WOLTOSZ WALTER S
1 May 2025
Director
Sold on a plan
10,604
$33.78
$358.20K
WOLTOSZ WALTER S
1 May 2025
Director
Sold on a plan
9,396
$33.20
$311.95K
WOLTOSZ WALTER S
1 Apr 2025
Director
Sold on a plan
2,600
$24.62
$64.01K
WOLTOSZ WALTER S
1 Apr 2025
Director
Sold on a plan
17,400
$24.01
$417.77K
WOLTOSZ WALTER S
3 Mar 2025
Director
Sold on a plan
20,000
$28.68
$573.60K
WOLTOSZ WALTER S
3 Feb 2025
Director
Sold on a plan
14,421
$34.06
$491.18K
WOLTOSZ WALTER S
3 Feb 2025
Director
Sold on a plan
5,579
$33.53
$187.06K
WOLTOSZ WALTER S
2 Jan 2025
Director
Sold on a plan
100
$28.50
$2.85K
WOLTOSZ WALTER S
2 Jan 2025
Director
Sold on a plan
19,900
$27.88
$554.81K
WEINER DANIEL L
27 Dec 2024
Director
Sold on a plan
750
$28.50
$21.38K
LaVange Lisa
2 Dec 2024
Director
Sold on a plan
650
$31.88
$20.72K
WOLTOSZ WALTER S
2 Dec 2024
Director
Sold on a plan
20,000
$31.76
$635.20K
WOLTOSZ WALTER S
1 Nov 2024
Director
Sold on a plan
20,000
$27.66
$553.20K
WOLTOSZ WALTER S
1 Oct 2024
Director
Sold on a plan
20,000
$31.26
$625.20K
WEINER DANIEL L
27 Sep 2024
Director
Sold on a plan
750
$31.54
$23.66K
LaVange Lisa
3 Sep 2024
Director
Sold on a plan
650
$35.95
$23.37K
WOLTOSZ WALTER S
3 Sep 2024
Director
Sold on a plan
1,958
$35.68
$69.86K
WOLTOSZ WALTER S
3 Sep 2024
Director
Sold on a plan
18,042
$35.13
$633.82K
WOLTOSZ WALTER S
1 Aug 2024
Director
Sold on a plan
1,700
$40.46
$68.78K
WOLTOSZ WALTER S
1 Aug 2024
Director
Sold on a plan
18,300
$39.55
$723.77K
WOLTOSZ WALTER S
1 Jul 2024
Director
Sold on a plan
600
$48.41
$29.05K
WOLTOSZ WALTER S
1 Jul 2024
Director
Sold on a plan
3,504
$47.47
$166.33K
WOLTOSZ WALTER S
1 Jul 2024
Director
Sold on a plan
15,896
$46.48
$738.85K
WEINER DANIEL L
28 Jun 2024
Director
Sold on a plan
750
$49.32
$36.99K
LaVange Lisa
3 Jun 2024
Director
Sold on a plan
650
$48.26
$31.37K
WOLTOSZ WALTER S
3 Jun 2024
Director
Sold on a plan
4,609
$47.08
$216.99K
WOLTOSZ WALTER S
3 Jun 2024
Director
Sold on a plan
15,391
$46.00
$707.99K
LaVange Lisa
14 May 2024
Director
Sold on a plan
500
$50.00
$25.00K
LaVange Lisa
7 May 2024
Director
Sold on a plan
650
$48.30
$31.40K
WOLTOSZ WALTER S
1 May 2024
Director
Sold on a plan
13,829
$46.23
$639.31K
WOLTOSZ WALTER S
1 May 2024
Director
Sold on a plan
6,171
$45.32
$279.67K
WOLTOSZ WALTER S
1 Apr 2024
Director
Sold on a plan
590
$41.04
$24.21K
WOLTOSZ WALTER S
1 Apr 2024
Director
Sold on a plan
19,410
$39.91
$774.65K
WOLTOSZ WALTER S
1 Mar 2024
Director
Sold on a plan
2,400
$41.72
$100.13K
WOLTOSZ WALTER S
1 Mar 2024
Director
Sold on a plan
17,600
$41.37
$728.11K
WOLTOSZ WALTER S
2 Feb 2024
Director
Sold on a plan
1,055
$37.64
$39.71K
WOLTOSZ WALTER S
1 Feb 2024
Director
Sold on a plan
300
$38.47
$11.54K
WOLTOSZ WALTER S
1 Feb 2024
Director
Sold on a plan
18,645
$38.01
$708.70K
Paglia John Kenneth
4 Jan 2024
Director
Sold on a plan
1,000
$43.74
$43.74K
WOLTOSZ WALTER S
2 Jan 2024
Director
Sold on a plan
464
$44.88
$20.82K
WOLTOSZ WALTER S
2 Jan 2024
Director
Sold on a plan
19,536
$44.45
$868.38K
DiBella John Anthony II
22 Dec 2023
Business Unit President
Sold on a plan
5,411
$45.16
$244.36K
WOLTOSZ WALTER S
5 Dec 2023
Director
Sold on a plan
7,050
$38.55
$271.78K
WOLTOSZ WALTER S
4 Dec 2023
Director
Sold on a plan
21,802
$38.67
$843.08K
WOLTOSZ WALTER S
1 Dec 2023
Director
Sold on a plan
6,123
$39.22
$240.14K
WOLTOSZ WALTER S
1 Dec 2023
Director
Sold on a plan
25,025
$38.70
$968.47K
Paglia John Kenneth
8 Nov 2023
Director
Sold on a plan
1,000
$35.25
$35.25K
WOLTOSZ WALTER S
2 Nov 2023
Director
Sold on a plan
2,720
$34.60
$94.11K
WOLTOSZ WALTER S
1 Nov 2023
Director
Sold on a plan
29,022
$34.69
$1.01M
WOLTOSZ WALTER S
1 Nov 2023
Director
Sold on a plan
28,258
$34.07
$962.75K
WOLTOSZ WALTER S
29 Jun 2023
Director
Sold on a plan
3,754
$42.88
$160.97K
WOLTOSZ WALTER S
28 Jun 2023
Director
Sold on a plan
16,246
$43.07
$699.72K
WOLTOSZ WALTER S
30 May 2023
Director
Sold on a plan
9,956
$46.35
$461.46K
WOLTOSZ WALTER S
30 May 2023
Director
Sold on a plan
10,044
$45.76
$459.61K
WOLTOSZ WALTER S
26 Apr 2023
Director
Sold on a plan
2,089
$42.14
$88.03K
WOLTOSZ WALTER S
26 Apr 2023
Director
Sold on a plan
17,911
$41.45
$742.41K
WOLTOSZ WALTER S
29 Mar 2023
Director
Sold on a plan
1,838
$43.50
$79.95K
WOLTOSZ WALTER S
29 Mar 2023
Director
Sold on a plan
18,162
$42.74
$776.24K
Showing 250 of 286 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 398
Amendments (4/A) skipped 7
Filings about a different issuer 0
Unreadable filings 0
Joint filings 119
Sales on a Rule 10b5-1 plan 77
Sales straight out of an exercise 9
Sales at will 176
Transactions with no price 33
Shares from compensation/vesting 1,211,742
Sales filed before the plan box existed 174
History held since 2 Sep 2016